public class TestInt {
    public static void main(String args[]){
        byte e = 50; //范围： -128 ~ 127

        int a = 100;   //十进制
        int b = 015;   //八进制
        int c = 0xff;  //十六进制
        int d = 0b1001010101;   //二进制

        System.out.println(a);
        System.out.println(b);
        System.out.println(c);
        System.out.println(d);

    }
}
